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High-Strength Hammer Drive Pin Expansion Anchor Bolts - China Suppliers & Factory Direct for Concrete Fixation

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Name: High-Strength Hammer Drive Pin Expansion Through Anchor Bolt
Material: Premium carbon steel or optional 304 stainless steel
Standards: Compliant with ETAG 001 and GB/T 22795
Grade: Available in 5.8 and 8.8
Sizes: Offered in M8, M10, M12, M14, M16, M20, with lengths ranging from 60mm to 200mm
Surface Treatment: High-gloss environmentally friendly yellow zinc or yellow zinc plating
Design Features: Innovative center pin hammer expansion mechanism, through-threaded and anti-slip flange nut, bottom cross anti-slip drive groove, exceptional shear and pull-out resistance, bright zinc finish for enduring rust protection
Applications: Ideal for heavy machinery and equipment installation, steel structures and curtain wall frames, infrastructure and transportation facilities, large outdoor sunshades and protective structures, and industrial plants and warehouse shelving
Delivery Time: 15-30 days post advance payment
Origin: China
Brand: JGD
Minimum Order Quantity: Starting at 10,000 pieces, negotiable
Samples: Available upon request
Packaging: Available in Boxed, Bulk, Pallet, or customized options
OEM: Custom manufacturing available
Suppliers: Trusted factory direct from China, ensuring quality and reliability.

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    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01
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    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01

    Key Features

    Our self-tapping screws are crafted from food-grade 304 stainless steel and treated to achieve metric Grade 12.9 ultra-high strength, overcoming the traditional hardness limitations of standard stainless steel. Featuring a countersunk Phillips head design, these screws can be installed flush with the workpiece surface for a zero-profile finish, making them ideal for precision electronics and architectural decoration. We have optimized the thread geometry for different substrates (metal, wood) to ensure low-torque driving with high-torque clamping, effectively preventing stripping. As a superior alternative to standard Tek screws, these fasteners perform exceptionally well in thin sheet metal connections, providing an intelligent fastening solution that balances aesthetics with high load-bearing capacity.
    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01
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    Precision Manufacturing Process

    From wire rod to finished product, we strictly adhere to multiple international standards including ISO, DIN, ANSI, and GB. Utilizing multi-station cold forging technology, we ensure shank diameter tolerances are controlled within microns. Threads are formed through a precision thread rolling process to enhance fastening force. For non-standard requirements, we employ optical imaging sorters to reject minute defects like head cracks. In post-treatment, we offer a wide range of surface finishing options: from conventional zinc plating and nickel plating to highly corrosion-resistant Hot-Dip Galvanizing (H.D.G.), as well as decorative polishing and black anodizing. We even provide food-grade passivation treatment, ensuring every screw has a prolonged fatigue life in demanding environments.
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    Transparency & Customization

    As a source factory, we are committed to breaking down the information barriers of traditional trade. From mill certificates for raw materials to hardness grades (covering Grade 4.8 to Grade 12.9, as well as A2-70 and A4-80 marine-grade stainless steel), all test data is traceable. We support full-chain customization: dimensionally, we can adjust thread length and head thickness according to drawings; functionally, we can combine processes like sandblasting, electrophoretic coating (e-coating) , or chrome plating. Whether you need British Standard (BS) fasteners or require a special colored anodized finish, we offer small-batch sampling. This ensures that when you purchase fasteners from us, you not only receive high-quality products but also full transparency and control over the entire process, from material selection to packaging.
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    No Pre-Drilling · Rust Resistant · More Secure

    This stainless steel Phillips countersunk self-tapping screw, with its rust-resistant and corrosion-resistant material, one-step self-tapping design, and aesthetically pleasing countersunk head structure, has become the preferred solution for metal substrate fastening scenarios that is efficient, reliable, and aesthetically pleasing.
    Product Details

    Manufacturing Process

    ⚙️Manufacturing Process

    • Multi Station Cold Heading Technology
    • Intelligent Heat Treatment System
    • Micron-Level Thread Rolling Process
    • Fully Automatic Optical Sorting
    • Environmentally Friendly Surface Treatment Line
    • Metallographic And Mechanical Joint Laboratory
    Quality Control System

    🛡️Quality Control System

    • Raw Material Source Locking
    • Furnace Number Batch Full Traceability
    • Third Party Material Certification
    • Process Parameters Open And Transparent
    • Salt Spray Test Real Time Monitoring
    • International Standard Compliance Declaration
    Flexible Customization Capability

    🎨Flexible Customization

    • Customizable head/slot Shapes
    • Extreme Application Of Special Materials
    • Breakthroughs In Extra Large/Long Specifications
    • Integrated Assembly Of Components
    • Customizable Surface Treatment Colors
    • Personalized Packaging And Labeling
    Center Pin Hammer Expansion

    Center Pin Hammer Expansion – Through Anchoring in One Step

    Insert the anchor through the workpiece into the base material hole, strike the center pin – the bottom expansion petals open at the hole bottom, creating a through mechanical lock. No nut tightening or waiting – hammering completes anchoring instantly. The threaded through-section protrudes outside, allowing adjustable clamping force with the flange nut – ideal for steel structures and curtain wall frames requiring through-profile fixing.

    Flange Nut

    Flange Nut with Anti-Slip Self-Locking – Vibration-Resistant

    The matching flange nut features dense anti-slip ribs on the bottom face, biting into the workpiece surface during tightening to resist vibration and impact loosening. The threaded through-section offers ample adjustment margin – even with hole depth deviations, preload can be precisely adjusted via the nut. The bottom cross anti-slip drive slot supports emergency removal – easy maintenance, stays secure in heavy machinery and industrial racking.

    High-Strength Carbon Steel

    High-Strength Carbon Steel + Bright Zinc Plating

    Made of 5.8/8.8 grade high-quality carbon steel with high tensile strength, easily handling heavy equipment loads. Bright eco-friendly yellow/blue-white zinc plating provides dense, uniform corrosion protection against moisture, rain, and mild corrosive environments. Integrally formed pins and expansion petals are hardened – withstand repeated hammering without cracking, and long-term cyclic loads without fatigue.

    Factory Environment & Equipment

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    High-Quality Stainless Steel Self-Tapping Screw Display

    Frequently Asked Questions

    What are the advantages of Center Pin Hammer Expansion anchors?
    They allow for through-anchoring in a single step. By striking the center pin, the anchor expands instantly at the bottom of the hole, eliminating the need for immediate nut tightening or waiting periods.
    How do you ensure the quality and traceability of your fasteners?
    We use a full traceability system based on furnace number batches, lock our raw material sources, and provide third-party material certifications and transparent process parameters.
    Can these anchors withstand high-vibration environments?
    Yes. Our flange nuts feature dense anti-slip ribs that bite into the workpiece surface, providing excellent resistance against loosening caused by vibration and impact.
    What kind of surface treatments do you offer for corrosion resistance?
    We provide environmentally friendly bright zinc plating (yellow or blue-white) and other customizable surface treatments that offer uniform protection against moisture and mild corrosive environments.
    Do you provide technical support for product selection?
    Absolutely. Our technical services include selection calculations, BOM optimization, on-site failure analysis, and guidance on installation tool selection.
    What customization options are available for specialized applications?
    We can customize head and slot shapes, use special materials for extreme applications, and manufacture extra-large or extra-long specifications to meet your specific project needs.